Once your money hits six figures, it gets hidden behind the “Upgrades” button… Hope this gets fixed.
Also, even when I increase the Spawn Frequency, the machines keep running at their initial speed, so I didn't really see the point of increasing their speed.
This is the kind of game where, once you've set up your parts, you can just sit back and watch. I'd like to keep it running in the system tray. Every now and then, I'd open it to check, "How's it going?" If that's possible, it could become a little secret pleasure of mine. 🙂